Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Nov. 30, 2016	Nov. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 149	$ 872
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	511	520
Amortization of debt financing costs	51	39
Share-based compensation	62	35
Change in assets and liabilities:
Accounts receivable	(670)	979
Inventories	(575)	(1,640)
Workers' compensation security deposit	604	940
Other current assets	(717)	(923)
Accounts payable, trade	92	111
Accrued liabilities	2,502	1,329
Other, net	46	(183)
Net cash from operating activities	2,055	2,079
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of property, plant and equipment	(787)	(245)
Other, net	(25)	(25)
Net cash from investing activities	(812)	(270)
Net increase in cash	1,243	1,809
Cash at beginning of period	7,659	4,995
Cash at end of period	$ 8,902	$ 6,804